Is Coke County, TX a radon risk area?

Coke County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Coke County ranks higher in radon potential than 2% of rated counties (the 2nd percentile).

Coke County by the numbers

About 3,396 people live in Coke County, Texas, spread over 911.647 square miles. Population density there runs about 4 people per square mile. Rank 969 by population within its EPA zone puts Coke County at the 6th percentile among zone peers. Coke County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

A Zone 3 county like Coke County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Even at Zone 3, Coke County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Coke County

Nothing about Coke County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Texas's state radon program

Coke County's test kit answers today; a Airthings radon monitor keeps answering for Coke County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Coke County carries, the zone explainer covers what it does and doesn't tell you about any one house.